Greenbrier Partners Capital Management - Performance Analysis
Investment performance metrics based on historical 13F filings data.
📊 Data Coverage: June 2013 to September 2025 • Initial Portfolio Value: $0.00B
Performance calculated from first filing in our database. This may not represent the investor's entire career.
Portfolio Growth (Since First Filing)
+1.48B
+9,999%+
Winning Positions
+62.86%
22 wins / 35 positions
Average Gain (Winners)
$69.08M
+9,999%+ avg per position
Active Positions
13
8 losing positions
Portfolio Value Over Time
Total Positions Tracked
35
All holdings over time
Win/Loss Ratio
2.75
22 gains / 8 losses
Active vs. Exited
13 / 22
Current positions / Exited
Position Performance
Performance calculated from first appearance in 13F filings. Initial values represent position value when first tracked, not actual purchase prices.
| Symbol | Company | Sector | Entry | Status | Initial Value | Current Value | Gain/Loss | Return % |
|---|---|---|---|---|---|---|---|---|
| AAPL | Apple Inc. | Technology | Jun 2013 | ACTIVE | $22.21K | $362.41M | $362.39M | +9,999%+ |
| META | Meta Platforms, Inc. | Communication Services | Jun 2013 | ACTIVE | $14.93K | $294.47M | $294.46M | +9,999%+ |
| COST | Costco Wholesale Corporation | Consumer Defensive | Jun 2013 | ACTIVE | $22.11K | $207.67M | $207.64M | +9,999%+ |
| AMZN | Amazon.com, Inc. | Consumer Cyclical | Jun 2016 | ACTIVE | $14.31K | $137.55M | $137.54M | +9,999%+ |
| GOOG | Alphabet Inc. | Communication Services | Dec 2015 | ACTIVE | $19.65K | $113.65M | $113.64M | +9,999%+ |
| GOOGL | Alphabet Inc. | Communication Services | Dec 2015 | ACTIVE | $20.09K | $110.98M | $110.96M | +9,999%+ |
| MSFT | Microsoft Corporation | Technology | Dec 2018 | ACTIVE | $5.08K | $62.07M | $62.07M | +9,999%+ |
| MKL | Markel Group Inc. | Financial Services | Jun 2013 | ACTIVE | $13.17K | $52.41M | $52.40M | +9,999%+ |
| BRK-B | Berkshire Hathaway Inc. New | Financial Services | Jun 2013 | ACTIVE | $22.38K | $44.22M | $44.20M | +9,999%+ |
| LUV | Southwest Airlines Company | Industrials | Jun 2013 | EXITED | $15.47K | $31.53M | $31.51M | +9,999%+ |
Important Note: Data Limitations
These metrics are based on 13F filing data which has significant limitations:
- Quarterly Snapshots Only: 13F filings show positions at quarter-end, not actual transaction prices
- No Transaction Prices: We cannot determine actual buy/sell prices, only end-of-quarter values
- Performance Estimates: Gains/losses are calculated from first appearance to last update using quarterly values
- Missing Data: Intra-quarter trades, dividends, corporate actions, and exact timing are not captured
- Educational Only: These metrics are estimates for understanding general investment patterns, not actual realized returns
Use these metrics for informational and educational purposes only. They represent broad trends, not precise investment performance.